Watch: SEETHER Performs FLYLEAF's 'I'm So Sick' With LACEY STURM In Pennsylvania

SEETHER was joined by former FLYLEAF singer Lacey Sturm last night (Saturday, April 30) during the band's concert at Santander Arena & Performing Arts Center to perform the FLYLEAF song "I'm So Sick". Fan-filmed video of her appearance can be seen below. Prior to launching into the track, SEETHE...